Answer:
$4
Step-by-step explanation:
Total expenditure is $55
Breakdown
2 books cost $10
4 books cost $25
Subtotal for 6 books is 10+25=$35
Remaining amount from total is 55-35=$20
If each book costs approximately $5 then for $20, each book is 20/5=$4
Answer:
Face diagonal of a cube:
Step-by-step explanation:
f2 = a2 + a. Then f2 = 2a.
Step-by-step explanation:
<em>it is a right angle triangle</em>
30square =14square +x square
900=196+xsquare
900-196=xsquare
704=xsquare
root704=x
26.532=x
90+26.532=63.468
180-63.468=116.532degree